From 82cb78d84c7962d2b55e1f83c9f8cbcbef386d87 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Tue, 2 Nov 1999 21:45:15 +0000 Subject: Split core message queue and watchdog handler objects into separate files. --- cpukit/score/src/watchdog.c | 234 -------------------------------------------- 1 file changed, 234 deletions(-) (limited to 'cpukit/score/src/watchdog.c') diff --git a/cpukit/score/src/watchdog.c b/cpukit/score/src/watchdog.c index a3ddf85420..f722e0835b 100644 --- a/cpukit/score/src/watchdog.c +++ b/cpukit/score/src/watchdog.c @@ -37,237 +37,3 @@ void _Watchdog_Handler_initialization( void ) _Chain_Initialize_empty( &_Watchdog_Ticks_chain ); _Chain_Initialize_empty( &_Watchdog_Seconds_chain ); } - -/*PAGE - * - * _Watchdog_Remove - * - * The routine removes a watchdog from a delta chain and updates - * the delta counters of the remaining watchdogs. - */ - -Watchdog_States _Watchdog_Remove( - Watchdog_Control *the_watchdog -) -{ - ISR_Level level; - Watchdog_States previous_state; - Watchdog_Control *next_watchdog; - - _ISR_Disable( level ); - previous_state = the_watchdog->state; - switch ( previous_state ) { - case WATCHDOG_INACTIVE: - break; - - case WATCHDOG_BEING_INSERTED: - - /* - * It is not actually on the chain so just change the state and - * the Insert operation we interrupted will be aborted. - */ - the_watchdog->state = WATCHDOG_INACTIVE; - break; - - case WATCHDOG_ACTIVE: - case WATCHDOG_REMOVE_IT: - - the_watchdog->state = WATCHDOG_INACTIVE; - next_watchdog = _Watchdog_Next( the_watchdog ); - - if ( _Watchdog_Next(next_watchdog) ) - next_watchdog->delta_interval += the_watchdog->delta_interval; - - if ( _Watchdog_Sync_count ) - _Watchdog_Sync_level = _ISR_Nest_level; - - _Chain_Extract_unprotected( &the_watchdog->Node ); - break; - } - the_watchdog->stop_time = _Watchdog_Ticks_since_boot; - - _ISR_Enable( level ); - return( previous_state ); -} - -/*PAGE - * - * _Watchdog_Adjust - * - * This routine adjusts the delta chain backward or forward in response - * to a time change. - * - * Input parameters: - * header - pointer to the delta chain to be adjusted - * direction - forward or backward adjustment to delta chain - * units - units to adjust - * - * Output parameters: - */ - -void _Watchdog_Adjust( - Chain_Control *header, - Watchdog_Adjust_directions direction, - Watchdog_Interval units -) -{ - if ( !_Chain_Is_empty( header ) ) { - switch ( direction ) { - case WATCHDOG_BACKWARD: - _Watchdog_First( header )->delta_interval += units; - break; - case WATCHDOG_FORWARD: - while ( units ) { - if ( units < _Watchdog_First( header )->delta_interval ) { - _Watchdog_First( header )->delta_interval -= units; - break; - } else { - units -= _Watchdog_First( header )->delta_interval; - _Watchdog_First( header )->delta_interval = 1; - _Watchdog_Tickle( header ); - if ( _Chain_Is_empty( header ) ) - break; - } - } - break; - } - } -} - -/*PAGE - * - * _Watchdog_Insert - * - * This routine inserts a watchdog timer on to the appropriate delta - * chain while updating the delta interval counters. - */ - -void _Watchdog_Insert( - Chain_Control *header, - Watchdog_Control *the_watchdog -) -{ - ISR_Level level; - Watchdog_Control *after; - unsigned32 insert_isr_nest_level; - Watchdog_Interval delta_interval; - - - insert_isr_nest_level = _ISR_Nest_level; - the_watchdog->state = WATCHDOG_BEING_INSERTED; - - _Watchdog_Sync_count++; -restart: - delta_interval = the_watchdog->initial; - - _ISR_Disable( level ); - - for ( after = _Watchdog_First( header ) ; - ; - after = _Watchdog_Next( after ) ) { - - if ( delta_interval == 0 || !_Watchdog_Next( after ) ) - break; - - if ( delta_interval < after->delta_interval ) { - after->delta_interval -= delta_interval; - break; - } - - delta_interval -= after->delta_interval; - - /* - * If you experience problems comment out the _ISR_Flash line. - * 3.2.0 was the first release with this critical section redesigned. - * Under certain circumstances, the PREVIOUS critical section algorithm - * used around this flash point allowed interrupts to execute - * which violated the design assumptions. The critical section - * mechanism used here WAS redesigned to address this. - */ - - _ISR_Flash( level ); - - if ( the_watchdog->state != WATCHDOG_BEING_INSERTED ) { - goto exit_insert; - } - - if ( _Watchdog_Sync_level > insert_isr_nest_level ) { - _Watchdog_Sync_level = insert_isr_nest_level; - _ISR_Enable( level ); - goto restart; - } - } - - _Watchdog_Activate( the_watchdog ); - - the_watchdog->delta_interval = delta_interval; - - _Chain_Insert_unprotected( after->Node.previous, &the_watchdog->Node ); - - the_watchdog->start_time = _Watchdog_Ticks_since_boot; - -exit_insert: - _Watchdog_Sync_level = insert_isr_nest_level; - _Watchdog_Sync_count--; - _ISR_Enable( level ); -} - -/*PAGE - * - * _Watchdog_Tickle - * - * This routine decrements the delta counter in response to a tick. The - * delta chain is updated accordingly. - * - * Input parameters: - * header - pointer to the delta chain to be tickled - * - * Output parameters: NONE - */ - -void _Watchdog_Tickle( - Chain_Control *header -) -{ - Watchdog_Control *the_watchdog; - - if ( _Chain_Is_empty( header ) ) - return; - - the_watchdog = _Watchdog_First( header ); - the_watchdog->delta_interval--; - if ( the_watchdog->delta_interval != 0 ) - return; - - do { - switch( _Watchdog_Remove( the_watchdog ) ) { - case WATCHDOG_ACTIVE: - (*the_watchdog->routine)( - the_watchdog->id, - the_watchdog->user_data - ); - break; - - case WATCHDOG_INACTIVE: - /* - * This state indicates that the watchdog is not on any chain. - * Thus, it is NOT on a chain being tickled. This case should - * never occur. - */ - break; - - case WATCHDOG_BEING_INSERTED: - /* - * This state indicates that the watchdog is in the process of - * BEING inserted on the chain. Thus, it can NOT be on a chain - * being tickled. This case should never occur. - */ - break; - - case WATCHDOG_REMOVE_IT: - break; - } - the_watchdog = _Watchdog_First( header ); - } while ( !_Chain_Is_empty( header ) && - (the_watchdog->delta_interval == 0) ); -} -- cgit v1.2.3